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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        let name = 'fan';
        let age = '33';
        let sayHa = 'letsayHi'
        let obj = {
            name,
            age,
            sayHi: function () {
                console.log('sayHi')
            },
            sayHa: () => {
                console.log('sayHa')
            },
            setSay() {
                alert('武汉疫情又开始了')
            },
            [sayHa]() {
                alert('xxx')
            }
        }

        console.log(obj)
        obj.letsayHi() //  [sayHa] 可以调用obj外的sayHa变量 alert ‘xxx’
        obj['sayHa']() // console.log('sayHa')
        obj.setSay()
    </script>
</body>

</html>